22 August 1948 at Eastbury Park, Tarrant Gunville, Blandford
| Fastest | Open | 500cc |
| Not Known | 1- A. Good | 1- Lew Coffin |
| 2- Lew Coffin | 2- A. Good | |
| 3- Bingley Cree | 3- T. Lewis | |
| Experts Barred | 350cc | Novices |
| 1- W. Lovelace | 1- Ticker James | 1- G. Ames |
| 2- D. Kelly | 2- Lew Coffin | 2- F. Dean |
| 3- T. Lewis | 3- F. Best | 3- H. Carder |